单项选择题

According to Cindy, what is the purpose of the synthesized voice on "smart" cars7

A．To warn of dangers.
B．To explain traffic regulations.
C．To wake up drivers who are falling asleep.
D．To give directions.
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Where did Cindy get her information about smart cars
A．From a newspaper advertisement.
B．From a magazine article.
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Which of the following is Cecilia trying to find
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